If your site is already active, I would also look at Google Analytics and see if any of your audience uses IE11.
And the last question, the user experience will, of course, be best on evergreen browsers, but will it completely break on older browsers?
If it had that, I'd buy one.
The amount of info being conveyed is not trivial. It's nature requires reader to think about what is being presented. There is likely not too many other options to more clearly visualize the data.
6 values for each company, and you want to convey relativity between the values of each company..
"No Opinion/Don't care" is sometimes gray, sometimes yellow, and sometime orange.
And for some graphs, the negative reaction is on the left and others the negative reaction is on the right.